Climate and monthly weather forecastDelaware, OH

The climate of Delaware

Delaware, Ohio, resting in the heartland of the United States, is typified by a Humid Continental climate (Dfa according to the Köppen classification). This specific classification is characterized by a distinct seasonality with warm to hot, often humid summers, and cold, usually snow-packed winters. On a 12-month rotation, the landscape in Delaware bustlingly transforms, displaying the diversity of its weather.

The temperature's annual swing in Delaware ripples from 20.3°F (-6.5°C) in January, peaking at 81.1°F (27.3°C) in July. This considerable fluctuation illustrates the differing climate stages over the year. Precipitation is evenly distributed throughout the year, accumulating to an annual average of around 30.3" (770mm). The city experiences more rainfall in May, receiving 3.82" (97mm), whilst the driest month is September with 1.93" (49mm) of rainfall.

Plentiful rainfall characterizes Delaware's climate, with the rain falling more frequently in the warmer months, from April to August. Humidity remains relatively stable throughout the year above the 75% mark, leading to a damp and sometimes clammy environment. It peaks to 84% in January. Notably, snowfall is present from November through to March but absent in the warmer months.

Delaware experiences ample daylight hours, marking a difference from the longest day in June (approximately 15 daylight hours) to the shortest in December (approximately 9.4 daylight hours). Likewise, the sunshine hours are similarly distributed peaking to approximately 10.4 daylight hours in August. The climate of Delaware is termed windy, as wind speed mostly fluctuates between 5.7mph (9.2km/h) to 10mph (16.1km/h) annually.

The best time to visit Delaware

The greatest time to visit Delaware, Ohio, is between May and September. During these months, temperatures gravitate around the comfortable 70°F (21.1°C) to 80°F (26.7°C) range, with minimal to zero snowfall. The higher temperatures, combined with extended daylight hours (exceeding 13 hours from April to September) and heightened sunshine duration (over 9 hours from May to August), provide ideal conditions for outdoor activities.

June, synonymous with welcoming the summer, also celebrates the longest days and the maximum UV Index. This period sees only a slight increase in humidity and manages to balance it with ample rainfall ensuring a refreshing atmosphere alongside warm temperatures.

The worst time to visit Delaware

The coldest months, namely December to February, could be the least appealing for travelers to Delaware. During this time, the city bares frigid temperatures, with the lower limit drooping to 20.3°F (-6.5°C). Coupled with regular snowfall up to 3.46" (88mm) in December, it may not be as conducive to outdoor activities unless winter sports are the primary draw.

The limited daylight hours (less than 10), reduced sunlight (less than 5 hours), and heightened relative humidity also align these months as less than ideal for tourists.

Spring weather in Delaware

Spring in Delaware is a season of rejuvenation and increasing warmth. Starting from March, temperatures gradually rise from 32.5°F (0.3°C) to 59.9°F (15.5°C) in April and finally stepping into the warmth of 71.1°F (21.7°C) in May. Both daylight and sunshine hours extend admirably from 12 to 14.4 hours and 6.1 to 9.1 hours respectively.

Despite temperatures sometimes being on the cooler side in early spring, this period experiences increasing rainfall, transitioning from a more solid precipitation form during winter. This increased rainfall peaks at 3.82" (97mm) in May, making spring in Delaware a wet season.

Summer weather in Delaware

June, July, and August are the summer months in Delaware. During this period, there's a noticeable heat with temperatures soaring from 77.9°F (25.5°C) in June, reaching a peak of 81.1°F (27.3°C) in July and starting to decline to 79.3°F (26.3°C) in August. This period is also one of the driest, with rainfall diminishing to around 2.8" (71mm), leading to rather hot and dry conditions.

Despite this, humidity lingers in the high 70s to low 80s%, ensuring the environment maintains a certain amount of moisture. These months enjoy the most daylight, stretching up to a maximum of 15 hours in June, and basking in the greatest amount of sunshine, calculating in 10.4 hours daily in August.

Autumn weather in Delaware

Autumn in Delaware begins in September and continues through November. The season is characterized by a gradual cooldown of temperatures, moving from a pleasant 74.7°F (23.7°C) in September to a cooler 48.6°F (9.2°C) in November. Daylight and sunshine hours also drop significantly during this period, descending from 12.4 hours to 10 hours and from 8.2 hours to 5.3 hours, respectively.

During these months, there is a noticeable decline in precipitation, with rainfall settling at 1.93" (49mm) in September, then gradually rising again through October and November. Despite this reduction, humidity remains steadily around 75 to 78%, maintaining a relatively moist and comfortable atmosphere.

Winter weather in Delaware

Winter months in Delaware, spanning from December to February, are cold and snowy. Low temperatures can drop to 20.3°F (-6.5°C), while high temperatures barely reach 32°F (0°C) in January. During this season, precipitation is majorly frozen in nature with the city witnessing snowfall of 3.46" (88mm), 3.39" (86mm), and 2.13" (54mm) in December, January, and February respectively.

The least amount of daylight and sunshine hours in the year is recorded in this season; daylight reduces to just 9.4 hours while sun rays last only for approximately 4.1 hours. Concurrently, the humidity climbs up to 84%. Despite these conditions, winter in Delaware is not devoid of charm. The snowy landscape offers opportunities for winter sports and other cold-weather activities.

Weather in January

January in Delaware, Ohio, welcomes the new year with a chill, as winter continues to dictate the area's climate. The month carries the brunt of winter’s frigid grip, a stark contrast to the mild conditions of December. Despite consistent cloud cover, snowfall remains minimal with only 3.46" (88mm) throughout the month. Weather in January »

Weather in February

February ushers in a slight rise in temperature, hinting at the arrival of spring in Delaware. Compared to January, the weather seems less harsh, with the landscape starting to show signs of life. Snowfall reduces considerably to 3.39" (86mm), reflecting the month's milder conditions. Weather in February »

Weather in March

The weather in March symbolizes a shift from winter to spring in Delaware. The cold subsides noticeably, and there’s a conspicuous drop in snowfall by 2.13" (54mm), indicating the last vestige of winter. The increase in sunlight promotes the thawing process, ushering in the emergence of greenery. Weather in March »

Weather in April

April's arrival brings forth clear signs of spring in full force throughout Delaware. The city rejuvenates under the warmth of longer sunlight hours, a significant improvement from the short days of March. The month’s striking feature is the absence of snowfall, standing at a negligible 0.31" (8mm). Weather in April »

Weather in May

May brings full spring weather to Delaware, offering pleasant and bright days. Compared to April, the increase in temperature is noticeable, as the last of the spring chills fade away. The city witnesses no snowfall, marking a complete transition into milder conditions. Weather in May »

Weather in June

June in Delaware signifies the onset of summer with the temperature rising notably compared to May. Heat becomes a primary weather feature, and mood around the city embodies a typical summer spirit. Snowfall remains non-existent, allowing residents to indulge in a plethora of outdoor events. Weather in June »

Weather in July

Delaware peaks in its summer heat during July, marking the height of the season. Following June’s trend, the temperature and humidity continue to escalate although the snowfall remains non-existent. Despite the soaring temperatures, the city bustles with summer activities and tourism. Weather in July »

Weather in August

August in Delaware brings a slight dip in temperature, providing the initial signs of summer’s departure. Despite being in the final phase of summer, the city continues to enjoy warm weather and outdoor extravaganzas. The absence of snowfall maintains a summer-like atmosphere, carrying on from July. Weather in August »

Weather in September

September escorts autumn into Delaware, bringing a noticeable drop in temperature when compared to August. The city starts to morph into its fall demeanor, blending warm days with cool nights. Snowfall remains absent, maximum wind speed stands at 6.6mph (10.6km/h), allowing the residents to savor the outdoors. Weather in September »

Weather in October

October ushers in colder days in Delaware, and the colors of autumn become more outstanding, as compared to September. The city embraces the fall weather, as temperatures fall consistently. A mild dusting of 0.12" (3mm) snow heralds the coming winter, hinting at possible snowfall. Weather in October »

Weather in November

November in Delaware signifies the beginning of winter. The decline in temperature from October is significant, and the chill in the air becomes more pronounced. The city receives it's first noteworthy snowfall to about 1.3" (33mm), officially marking the start of winter. Weather in November »

Weather in December

December rings in the winter proper in Delaware, with sharp contrast to the relatively mild November weather. As the coldest month of the year, it wraps the city in a blanket of chill. Snowfall sees an increase, measuring 2.87" (73mm), and adding to the festive spirit. Weather in December »